WO2021169836A1

WO2021169836A1 - Data transmission method and apparatus, and storage medium

Info

Publication number: WO2021169836A1
Application number: PCT/CN2021/076706
Authority: WO
Inventors: 李楠; 杨丹; 韩志强; 孙波
Original assignee: 中兴通讯股份有限公司
Priority date: 2020-02-28
Filing date: 2021-02-18
Publication date: 2021-09-02
Also published as: US20230047526A1; JP7379719B2; CN112511279B; EP4080806A1; EP4080806A4; CN112511279A; JP2023510894A

Abstract

Provided are a data transmission method and apparatus, and a storage medium. The data transmission method comprises: a first communication node successfully contending, on a first path, for a channel; the first communication node executing, on a second path, channel detection within a preset duration before a sending time of the first path, so as to obtain a detection result; and if the detection result indicates a channel is idle, the first communication node sending, on the second path, a notification frame to a second communication node, wherein the notification frame is used for instructing the second communication node to not send data on the second path.

Description

Data transmission method, device and storage medium

This application claims the priority of a Chinese patent application filed with the Chinese Patent Office on February 28, 2020, with an application number of 202010130153.3, and the entire content of the application is incorporated into this application by reference.

Technical field

This application relates to a wireless communication network, for example, to a data transmission method, device, and storage medium.

Background technique

In the field of wireless networks, wireless local area networks (WLANs) are developing rapidly. In a WLAN, the main equipment is a station, and the station is divided into an access station (Access Point, AP) and a non-access station (non-AP Station, STA for short). Generally, an AP establishes a basic service set (Basic Service Set, BSS), and the STA associates and communicates with an AP through processes such as scanning, authentication, and association. In WLAN, a STA is only associated with one AP at any time. The STA communicates with the associated AP, or communicates with other STAs through the associated AP, or establishes direct communication after association, so that it does not associate with the AP but communicates with other APs. The associated STA communicates. In another type of wireless local area network, such as an independent BSS (Independent BSS, IBSS), there is no AP, and all STAs can directly communicate with STAs within their communication range.

With the development of wireless network technology, AP devices and STA devices supporting multi-channel functions have emerged. A channel can also be called a channel, a link, etc. A channel can be understood as a path of a wireless medium for transmitting data packets, and a channel usually corresponds to a wireless channel. Multi-channel function means that AP devices or STA devices may work simultaneously or non-simultaneously on one or more channels in unlicensed frequency bands such as 2.4GHz, 5GHz, 6GHz, and below 1GHz. One AP device includes multiple APs, and one STA device includes multiple STAs, and each AP or STA works on one of the above-mentioned channels. Figure 1 is a schematic diagram of a working channel between an AP device and a STA device. As shown in Figure 1, the AP device includes three APs, and the three APs work on channel 1, channel 2, and channel 3 respectively. The STA device includes three STAs, which work on channel 1, channel 2, and channel 3 respectively, and communicate with AP1, AP2, and AP3. Figure 2 is another schematic diagram of the working channels of the AP device and the STA device. The AP device can work on channel 1, channel 2 and channel 3. In some cases, the set of channels on which the STA device works is a subset of the AP device. , That is, the STA device may work on channel 2 and channel 3.

Regardless of the AP device or the STA device, when the frequency separation between certain two channels of the same device is insufficient, one of the two channels sends and the other starts to receive at the same time, and self-interference will occur between the channels.

As shown in Figure 2, suppose that in the AP device, channel 1 and channel 2 cannot send and receive data at the same time due to the insufficient frequency interval. In other words, when the AP device sends data on channel 1, it cannot receive data through channel 2 at the same time. If the AP device sends downlink data on channel 1, and the STA device is not working on channel 1, it will not listen to channel 1. Therefore, the STA device may start to send uplink data to the AP device on channel 2, which will cause the AP Interference occurs between the two channels of the device.

Summary of the invention

This application provides a data transmission method, device, and storage medium to solve the technical problem of interference between two channels of a communication node caused by a transmission method.

An embodiment of the present application provides a data transmission method, including:

The first communication node successfully competes for the channel on the first channel;

On the second channel, the first communication node performs channel detection within a preset period of time before the transmission time of the first channel, and obtains a detection result;

If the detection result is idle, the first communication node sends a notification frame to the second communication node on the second channel; wherein the notification frame is used to indicate that the second communication node is on the first communication node. No data is sent on the second channel.

The second communication node receives the notification frame sent by the first communication node on the second channel; wherein the notification frame is used to instruct the second communication node not to send data on the second channel;

The second communication node determines not to send data on the second channel according to the notification frame.

An embodiment of the application provides a data transmission device, including:

A processor, which is used to implement the data transmission method of any of the foregoing embodiments when a computer program is executed.

The embodiments of the present application provide a storage medium, and the storage medium stores a computer program. When the computer program is executed by a processor, any data transmission method in the embodiments of the present application is implemented.

Description of the drawings

Figure 1 is a schematic diagram of a working channel between an AP device and an STA device;

FIG. 2 is another schematic diagram of the working channel of the AP device and the STA device;

Figure 3 is a schematic diagram of the structure of the basic service set;

FIG. 4 is a flowchart of a data transmission method provided by an embodiment;

Fig. 5 is a schematic diagram of a working channel of a first communication node;

FIG. 6A is a schematic diagram of a sequence of channel detection performed by the first communication node on the second channel; FIG.

FIG. 6B is another timing diagram of the first communication node performing channel detection on the second channel;

FIG. 7 is a flowchart of a data transmission method provided by another embodiment;

FIG. 8 is a signaling interaction diagram of a data transmission method provided by an embodiment;

FIG. 9 is a schematic structural diagram of a data transmission device provided by an embodiment;

FIG. 10 is a schematic structural diagram of a data transmission device according to another embodiment;

FIG. 11 is a schematic structural diagram of a data transmission device provided by another embodiment.

Detailed ways

Hereinafter, the embodiments of the present application will be described in detail with reference to the accompanying drawings. It should be noted that the embodiments in the application and the features in the embodiments can be combined with each other arbitrarily if there is no conflict.

Figure 3 is a schematic diagram of the structure of the basic service set. As shown in Figure 3, an AP device and multiple STA devices associated with the AP device form a BSS. In Figure 3, there are three STA devices associated with the AP device: STA1, STA2, and STA3. The AP device in this application supports multi-channel functions, including multiple APs, and each AP can simultaneously or non-simultaneously work on one or more channels on unlicensed frequency bands such as 2.4GHz, 5GHz, 6GHz, and below 1GHz. The STA device in this application also supports multi-channel functions, including multiple STAs, and each STA can work on one or more of the aforementioned channels simultaneously or non-simultaneously. Please continue to refer to Figure 2. If the channel 1 and channel 2 in the AP device cannot send and receive data at the same time due to insufficient frequency separation, when the AP device sends downlink data on channel 1, at this time, the STA device may be in the channel because it does not monitor channel 1. 2 Send uplink data to the AP device, which will cause interference between channel 1 and channel 2 of the AP device.

The present application provides a data transmission method. The first communication node performs channel detection on the second channel before the transmission time of the successful first channel to obtain the detection result. If the detection result is idle, the first communication node Send a notification frame to the second communication node on the second channel, where the notification frame is used to instruct the second communication node not to send data on the second channel, so that when the first communication node sends data on the first channel, The second communication node does not send data on the second channel, thereby avoiding the interference of the first communication node to the first channel due to receiving data on the second channel, and improving the reliability of the communication of the first communication node sex.

Fig. 4 is a flowchart of a data transmission method provided by an embodiment. This embodiment describes the data transmission method from the perspective of the first communication node. As shown in Figure 4, the data transmission method provided in this embodiment includes the following steps:

Step 401: The first communication node successfully competes for the channel on the first channel.

The communication nodes in this embodiment are all devices working in an unlicensed frequency band, and these devices basically adopt a listen before talk (LBT) mechanism. In order to be able to transmit in the unlicensed frequency band, the device will first monitor the wireless medium for a period of time. In this embodiment, the channel where the first communication node successfully competes for the channel is called the first channel.

After successfully competing for the channel, the first communication node will send data on the first channel. In this embodiment, the sending time of the first channel is denoted as t. The sending time of the first channel refers to the time at which the first communication node sends data on the first channel after successfully competing for the channel on the first channel.

Step 402: The first communication node performs channel detection on the second channel within a preset period of time before the sending time of the first channel, and obtains the detection result.

In one embodiment, the preset duration is predefined by the system.

In an embodiment, the preset time period ends before the sending time of the first channel, or the preset time period ends before the sending time of the first channel.

In an embodiment, the second channel is all channels except the first channel among the channels of the first communication node.

In another embodiment, the second channel is a channel in the first communication node that cannot perform receiving and sending operations simultaneously with the first channel. The inability to send and receive data simultaneously with the first channel means that when the first communication node sends data on the first channel, it cannot receive data through the second channel, or when the first communication node sends data on the second channel, it cannot Receive data through the first channel.

Fig. 5 is a schematic diagram of a working channel of a first communication node. As shown in Figure 5, the first communication node can work on channel 1, channel 2, and channel 3. The center frequency point corresponding to channel 1 is f1, the center frequency point corresponding to channel 2 is f2, and the center frequency point corresponding to channel 3 is f3. In channel 1, channel 2, and channel 3, the absolute value of the difference between the corresponding center frequency points is less than the first frequency interval threshold. The receiving and sending operations cannot be performed at the same time. The absolute value of the difference value of the corresponding center frequency points is greater than Or, two channels equal to the first frequency interval threshold can be simultaneously transmitted and received. Wherein, the first frequency interval threshold is used to indicate the minimum absolute value of the difference between the center frequency points corresponding to the two channels that can simultaneously transmit and receive in the first communication node.

FIG. 6A is a schematic diagram of a sequence of channel detection performed by the first communication node on the second channel. As shown in FIG. 6A, the first communication node supports working on the first channel, the second channel, and the third channel. The first communication node performs channel detection within a preset time period D before the transmission time t of the first channel, and the preset time period D ends at the transmission time of the first channel.

In an embodiment, if the first communication node determines that it is on the second channel, the signal strength detection result is idle within a preset period of time before the sending time of the first channel, and the network allocation vector corresponding to the second channel is zero , It is determined that the detection result is idle. Among them, signal strength detection refers to: acquiring the signal strength of the signal transmitted on the second channel within the preset time period D before time t; if the signal strength is less than the preset signal strength threshold, it can be determined that there is no signal strength on the second channel at this time For data transmission, it is determined that the signal strength detection result is idle.

FIG. 6B is another timing diagram of the first communication node performing channel detection on the second channel. The first communication node supports working on the first channel, the second channel, and the third channel. The first communication node performs channel detection in a preset time period D before the sending time t of the first channel, and the preset time period D ends before the sending time of the first channel.

Step 403: If the detection result is idle, the first communication node sends a notification frame to the second communication node on the second channel.

Wherein, the notification frame is used to instruct the second communication node not to send data on the second channel.

In an embodiment, the first communication node is an AP device, and the second communication node is an STA device associated with the first communication node. The first communication node and the second communication node form a BSS.

In another embodiment, the first communication node is an STA device, and the second communication node is an STA device associated with the first communication node. The first communication node and the second communication node form an IBSS.

In still another embodiment, the second communication node is a communication node associated with the first communication node and not currently working on the first channel. The second communication node currently does not work on the first channel, which means that the second communication node does not support working on the first channel, or although the second communication node supports working on the first channel, it does not currently work on the first channel. On the channel.

Optionally, in step 403, the first communication node sends a notification frame to the second communication node on the second channel at a preset time. Wherein, the preset time is a time no later than the sending time of the first channel. In other words, the first communication node sends a notification frame to the second communication node on the second channel before or while sending the data frame on the first channel.

Please continue to refer to FIG. 6A, the second communication node works on the second channel and the third channel. When determining that the detection result is idle, the first communication node sends a notification frame to the second communication node on the second channel while sending the data frame on the first channel. The notification frame is used to instruct the second communication node not to send data on the second channel. After receiving the notification frame, the second communication node does not send data on the second channel according to the indication of the notification frame.

Please continue to refer to FIG. 6B, the second communication node works on the second channel and the third channel. The first communication node detects that the channel is idle during the preset time period D, and sends a notification frame to the second communication node on the second channel before sending the data frame on the first channel. In this embodiment, the first communication node sends a notification frame to the second communication node on the second channel, and the notification frame is sent earlier than the sending time on the first channel, that is, when the first communication node is idle on the second channel , To notify the second communication node of the transmission of the first channel in advance. The notification frame is used to instruct the second communication node not to send data on the second channel. After receiving the notification frame, the second communication node does not send data on the second channel according to the indication of the notification frame.

In the case that the preset duration D ends before the sending time of the first channel, the first communication node may also send a notification frame to the second communication node on the second channel while sending the data frame on the first channel.

In an embodiment, the notification frame includes at least one of the following: the type of the notification frame, the identifier of the first channel, the length of time the first communication node transmits on the first channel, and the transmission time of the first communication node on the first channel.

Wherein, the type of the notification frame is used to indicate that the notification frame is a frame that notifies the first communication node that it is sending. In an embodiment, the physical layer signaling of the notification frame may be used to carry the type of the notification frame.

In an embodiment, the identification of the first channel includes at least one of the following: a channel number, a center frequency point corresponding to the channel, and a link number.

When the notification frame includes the time length sent by the first communication node on the first channel, the second communication node determines not to send data on the second channel within the time length according to the notification frame. Specifically, after receiving the notification frame, the second communication node does not send data on the second channel within the aforementioned time period.

When the notification frame includes the sending time of the first communication node on the first channel, when the first communication node sends the notification frame on the second channel in advance before sending the data frame on the first channel, the second communication node may send the notification frame according to the notification frame. The sending time of the first channel is determined, and further, the second communication node does not send data on the second channel within the sending time of the first channel after the sending time.

The data transmission method provided in this embodiment includes: the first communication node successfully competes for the channel on the first channel; the first communication node performs channel detection on the second channel within a preset period of time before the transmission time of the first channel , Obtain the detection result; if the detection result is idle, the first communication node sends a notification frame to the second communication node on the second channel, where the notification frame is used to instruct the second communication node not to send data on the second channel, It is realized that when the first communication node sends data on the first channel, the second communication node does not send data on the second channel. Furthermore, it prevents the first communication node from sending data to the first communication node due to receiving data on the second channel. The interference caused by the channel improves the reliability of the communication of the first communication node.

In one embodiment, in order to avoid that the first communication node informs the second communication node of the channels supported by itself in an enumerated manner, the channel that cannot send and receive at the same time (or the channel that can send and receive at the same time) causes too much overhead. In this embodiment, before step 401 is executed, the first communication node sends the first multi-channel capability parameter to the second communication node. Wherein, the first multi-channel capability parameter includes at least a first frequency interval threshold.

Optionally, the first multi-channel capability parameter may further include at least one of the following: the working frequency band of the channel supported by the first communication node, the center frequency point corresponding to the channel, the bandwidth of the channel, and whether multiple channels are supported for simultaneous transmission and reception.

As shown above, the first frequency interval threshold is used to indicate the minimum absolute value of the difference between the center frequency points corresponding to the two channels that can simultaneously transmit and receive in the first communication node.

After receiving the first multi-channel capability parameter, the second communication node determines, according to the first frequency interval threshold, a channel in the first communication node that cannot simultaneously perform receiving and sending operations (or channels capable of performing simultaneous receiving and sending operations). The specific process is: the second communication node determines the two channels in the first communication node whose absolute value of the difference between the corresponding center frequency points is less than the first frequency interval threshold as the channels in the first communication node that cannot transmit and receive at the same time ; The second communication node determines the two channels in the first communication node that have the corresponding center frequency difference in absolute value greater than or equal to the first frequency interval threshold as channels in the first communication node that can simultaneously perform receiving and sending operations .

In this embodiment, the first multi-channel capability parameter is sent to the second communication node through the first communication node, where the first multi-channel capability parameter includes at least the first frequency interval threshold, which enables the first communication node to pass the first frequency The interval threshold declares to the second communication node the minimum value of the absolute value of the difference between the center frequency points corresponding to the two channels that can transmit and receive at the same time, so that the second communication node determines the first communication according to the first frequency interval threshold. The channels through which the nodes can send and receive at the same time or cannot send and receive at the same time avoid the situation that the overhead caused by notifying the second communication node in an enumeration manner is too large.

In an embodiment, since the hardware performance of the first communication node and the second communication node are different, the minimum absolute value of the difference between the center frequency points corresponding to the two channels in the first communication node that can simultaneously transmit and receive operations , Is different from the minimum absolute value of the difference between the center frequency points corresponding to the two channels in the second communication node that can simultaneously perform receiving and sending operations. In order to let the first communication node know the channels in the second communication node that can simultaneously perform receiving and sending operations or the channels that cannot perform simultaneous receiving and sending operations, and to prevent the second communication node from notifying the first communication node in an enumerated manner, in this embodiment, the second communication node The communication node needs to send the second multi-channel capability parameter to the first communication node. Wherein, the second multi-channel capability parameter includes a second frequency interval threshold. Correspondingly, before step 401, the first communication node receives the second multi-channel capability parameter sent by the second communication node.

Wherein, the second frequency interval threshold is used to indicate the minimum absolute value of the difference between the center frequency points corresponding to the two channels that can simultaneously perform receiving and sending operations in the second communication node. In the second communication node, the absolute value of the difference between the corresponding center frequency point is less than the second frequency interval threshold, and the two channels cannot be sent and received at the same time; in the second communication node, the absolute value of the difference value of the corresponding center frequency point The two channels whose value is greater than or equal to the second frequency interval threshold can receive and transmit at the same time.

Optionally, the second multi-channel capability parameter may further include at least one of the following: the working frequency band of the channel supported by the second communication node, the center frequency point corresponding to the channel, the bandwidth of the channel, and whether multiple channels are supported for simultaneous transmission and reception.

After receiving the second multi-channel capability parameter, the first communication node determines, according to the second frequency interval threshold, a channel in the second communication node that cannot simultaneously perform receiving and sending operations (or channels that can simultaneously perform receiving and sending operations). The specific process is as follows: the first communication node determines the two channels in the second communication node whose absolute value of the difference between the corresponding center frequency points is less than the second frequency interval threshold as the channels in the second communication node that cannot transmit and receive at the same time ; The first communication node determines the two channels in the second communication node whose corresponding center frequency difference absolute value is greater than or equal to the second frequency interval threshold as the channels in the second communication node that can simultaneously perform receiving and sending operations .

In this embodiment, the second multi-channel capability parameter sent by the second communication node is received through the first communication node, where the second multi-channel capability parameter includes at least the second frequency interval threshold, which enables the second communication node to pass the second The frequency interval threshold declares to the first communication node the minimum absolute value of the difference between the center frequency points corresponding to the two channels that can simultaneously transmit and receive operations, so that the first communication node determines the second frequency interval threshold according to the second frequency interval threshold. The channels through which the communication node can send and receive at the same time or cannot send and receive at the same time avoid the situation that the overhead caused by notifying the first communication node in an enumeration manner is too large.

Fig. 7 is a flowchart of a data transmission method according to another embodiment. This embodiment describes the data transmission method from the perspective of the second communication node. As shown in FIG. 7, the data transmission method provided in this embodiment includes the following steps:

Step 701: The second communication node receives a notification frame sent by the first communication node on the second channel.

The second communication node receives the notification frame, and judges that the sender is the first communication node through the sender identifier carried in the notification frame; judging by the frame type that the frame is used to notify the first communication node that it is sending on a certain channel.

In an embodiment, the identification of the first channel includes at least one of the following: a channel number, a center frequency point corresponding to the channel, and a link number. The second communication node judges that the first communication node is transmitting on the first channel through the first channel identifier.

In an embodiment, the first communication node sends the notification frame to the second communication node at the same time or before the data frame is sent by the first channel. That is, the sending time of the notification frame is no later than the sending time of the first channel.

Step 702: The second communication node determines not to send data on the second channel according to the notification frame.

When the notification frame includes the time length sent by the first communication node on the first channel, the second communication node determines not to send data on the second channel within the time length according to the notification frame. In another embodiment, when the read frame type is a frame that notifies the first communication node that it is sending, the duration calculated by the parameters in the physical layer signaling is the duration of the first communication node sending on the first channel.

The notification frame includes the sending time of the first communication node on the first channel, and the second communication node can determine the sending time of the first channel. After the sending moment, the second communication node does not send data on the second channel.

In an embodiment, the second channel is a channel in the first communication node that cannot perform receiving and sending operations simultaneously with the first channel.

In an embodiment, the second communication node sets its own virtual carrier vector according to the time length sent by the first communication node on the first channel, and does not compete for the channel within the time length.

In an embodiment, the second communication node is a communication node associated with the first communication node and not currently working on the first channel.

The data transmission method provided in this embodiment realizes that when the first communication node sends data on the first channel, the second communication node does not send data on the second channel, thereby avoiding the need for the first communication node to be on the second channel. The situation of receiving data on the channel and causing interference to the first channel improves the reliability of the communication of the first communication node.

In an embodiment, before step 701, the second communication node receives the first multi-channel capability parameter sent by the first communication node. Wherein, the first multi-channel capability parameter includes at least a first frequency interval threshold.

The first frequency interval threshold is used to indicate the minimum absolute value of the difference between the center frequency points corresponding to the two channels that can simultaneously transmit and receive in the first communication node. In the first communication node, the absolute value of the difference between the corresponding center frequency points is less than the first frequency interval threshold, and the two channels cannot be sent and received at the same time; in the first communication node, the absolute value of the difference value of the corresponding center frequency point is Two channels whose values are greater than or equal to the first frequency interval threshold can receive and transmit at the same time.

In this embodiment, it is realized that the second communication node determines the channels through which the first communication node can send and receive at the same time or cannot send and receive at the same time according to the first frequency interval threshold, which avoids the problem caused by the first communication node notifying the second communication node by enumeration. Too much overhead.

In an embodiment, before step 701, the second communication node sends the second multi-channel capability parameter to the first communication node. Wherein, the second multi-channel capability parameter includes at least a second frequency interval threshold.

The second frequency interval threshold is used to indicate the minimum absolute value of the difference between the center frequency points corresponding to the two channels that can simultaneously perform receiving and sending operations in the second communication node. In the second communication node, the absolute value of the difference between the corresponding center frequency point is less than the second frequency interval threshold, and the two channels cannot be sent and received at the same time; in the second communication node, the absolute value of the difference value of the corresponding center frequency point The two channels whose value is greater than or equal to the second frequency interval threshold can receive and transmit at the same time.

In this embodiment, it is realized that the second communication node declares to the first communication node through the second frequency interval threshold the minimum absolute value of the difference between the center frequency points corresponding to the two channels on which it can transmit and receive at the same time, and then , Enabling the first communication node to determine the channels through which the second communication node can send and receive at the same time or cannot send and receive at the same time according to the second frequency interval threshold, avoiding the situation that the overhead caused by notifying the first communication node in an enumeration manner is too large.

Fig. 8 is a signaling interaction diagram of a data transmission method provided by an embodiment. This embodiment describes the data transmission method from the perspective of interaction between the first communication node and the second communication node. As shown in FIG. 8, the data transmission method provided in this embodiment includes the following steps:

Step 801: The first communication node sends the first multi-channel capability parameter to the second communication node.

Wherein, the first multi-channel capability parameter includes at least a first frequency interval threshold.

Step 802: The second communication node receives the first multi-channel capability parameter sent by the first communication node.

Step 803: The second communication node determines, according to the first multi-channel capability parameter, a channel that cannot transmit and receive at the same time or a channel that can transmit and receive at the same time in the first communication node.

In an embodiment, the second communication node determines that the absolute value of the difference between the corresponding center frequency points in the first communication node is less than the first frequency interval threshold for two channels that cannot be sent and received at the same time in the first communication node. Channel; the second communication node determines the two channels in the first communication node whose corresponding center frequency difference absolute value is greater than or equal to the first frequency interval threshold as the first communication node that can simultaneously transmit and receive operations aisle.

Step 804: The second communication node sends the second multi-channel capability parameter to the first communication node.

Wherein, the second multi-channel capability parameter includes at least a second frequency interval threshold.

It should be noted that there is no timing relationship between step 804 and step 801, step 802, and step 803.

Step 805: The first communication node receives the second multi-channel capability parameter sent by the second communication node.

Step 806: The first communication node determines, according to the second multi-channel capability parameter, a channel that cannot send and receive at the same time or a channel that can send and receive at the same time in the second communication node.

In an embodiment, the first communication node determines that the absolute value of the difference between the corresponding center frequency points in the second communication node is less than the second frequency interval threshold for two channels that cannot be sent and received at the same time in the second communication node. Channel; the first communication node determines the two channels in the second communication node whose corresponding center frequency difference absolute value is greater than or equal to the second frequency interval threshold as the two channels in the second communication node that can simultaneously transmit and receive aisle.

It should be noted that all steps 801 to 806 are optional steps.

Step 807: The first communication node successfully competes for the channel on the first channel.

Step 808: The first communication node performs channel detection on the second channel within a preset period of time before the sending time of the first channel, and obtains the detection result.

Step 809: If the detection result is idle, the first communication node sends a notification frame to the second communication node on the second channel.

The implementation process and technical principles of step 807 and step 401, step 808 and step 402, step 809 and step 403 are similar, and will not be repeated here.

Step 810: The second communication node receives the notification frame sent by the first communication node on the second channel.

Step 811: The second communication node determines not to send data on the second channel according to the notification frame.

Step 810 is similar to step 701, and the implementation process and technical principle of step 811 and step 702 are similar, and will not be repeated here.

The data transmission method provided in this embodiment, on the one hand, avoids that the first communication node and the second communication node notify each other through enumeration of channels that cannot be sent and received at the same time (or channels that can send and receive at the same time) caused by Too much overhead. On the other hand, when the first communication node sends data on the first channel, the second communication node does not send data on the second channel. Furthermore, it avoids that the first communication node needs to be on the second channel. The situation of receiving data on the second channel and causing interference to the first channel improves the reliability of the communication of the first communication node.

FIG. 9 is a schematic structural diagram of a data transmission device provided by an embodiment. The device can be arranged in the first communication node. As shown in FIG. 9, the data transmission device provided in this embodiment includes a competition channel module 91, an acquisition module 92, and a sending module 93.

The competition channel module 91 is configured to successfully compete for the channel on the first channel.

The obtaining module 92 is configured to perform channel detection on the second channel within a preset period of time before the sending time of the first channel, and obtain the detection result.

In an embodiment, the acquisition module 92 is specifically configured to: if it is determined that it is on the second channel, the signal strength detection result is idle within a preset period of time before the sending time of the first channel, and the network allocation corresponding to the second channel If the vector is zero, it is determined that the detection result is idle.

The sending module 93 is configured to send a notification frame to the second communication node on the second channel if the detection result is idle.

In an embodiment, the sending module 93 is specifically configured to send a notification frame to the second communication node on the second channel at a preset time. Wherein, the preset time is a time no later than the sending time of the first channel.

In an embodiment, the sending module 93 is further configured to send the first multi-channel capability parameter to the second communication node. Wherein, the first multi-channel capability parameter includes at least a first frequency interval threshold.

In an embodiment, the first frequency interval threshold is used to indicate the minimum absolute value of the difference between the center frequency points corresponding to the two channels that can simultaneously transmit and receive in the first communication node. In the first communication node, the absolute value of the difference between the corresponding center frequency points is less than the first frequency interval threshold, and the two channels cannot be sent and received at the same time; in the first communication node, the absolute value of the difference value of the corresponding center frequency point is Two channels whose values are greater than or equal to the first frequency interval threshold can receive and transmit at the same time.

In an embodiment, the device further includes: a receiving module configured to receive the second multi-channel capability parameter sent by the second communication node. Wherein, the second multi-channel capability parameter includes a second frequency interval threshold.

In an embodiment, the second frequency interval threshold is used to indicate the minimum absolute value of the difference between the center frequency points corresponding to the two channels that can simultaneously transmit and receive in the second communication node. In the second communication node, the absolute value of the difference between the corresponding center frequency point is less than the second frequency interval threshold, and the two channels cannot be sent and received at the same time; in the second communication node, the absolute value of the difference value of the corresponding center frequency point The two channels whose value is greater than or equal to the second frequency interval threshold can receive and transmit at the same time.

The data transmission device provided in this embodiment is used to implement the data transmission method of the embodiment shown in FIG.

FIG. 10 is a schematic structural diagram of a data transmission device according to another embodiment. The device can be arranged in the second communication node. As shown in FIG. 10, the data transmission device provided in this embodiment includes a receiving module 94 and a determining module 95.

The receiving module 94 is configured to receive the notification frame sent by the first communication node on the second channel.

The determining module 95 is configured to determine not to send data on the second channel according to the notification frame.

In an embodiment, when the notification frame includes the time length sent by the first communication node on the first channel, the determining module 95 is specifically configured to determine not to send data on the second channel within the time length according to the notification frame.

In an embodiment, the receiving module 94 is further configured to receive the first multi-channel capability parameter sent by the first communication node. Wherein, the first multi-channel capability parameter includes at least a first frequency interval threshold.

In an embodiment, the device further includes: a sending module configured to send the second multi-channel capability parameter to the first communication node. Wherein, the second multi-channel capability parameter includes at least a second frequency interval threshold.

FIG. 11 is a schematic structural diagram of a data transmission device provided by another embodiment. As shown in FIG. 11, the data transmission device includes a processor 96. Optionally, a memory 97 is further included. The number of processors 96 in the data transmission device may be one or more. In FIG. 11, one processor 96 is taken as an example; the processor 96 and the memory 97 in the data transmission device may be connected by a bus or other means, FIG. 11 Take the bus connection as an example.

As a computer-readable storage medium, the memory 97 can be used to store software programs, computer-executable programs, and modules, such as program instructions/modules corresponding to the data transmission method in the embodiment of FIG. 4 and FIG. 7 of this application (for example, data transmission The competing channel module 91, the acquiring module 92, and the sending module 93 in the device, or the receiving module 94 and the determining module 95 in the data transmission device). The processor 96 executes various functional applications and data processing of the data transmission device by running the software programs, instructions, and modules stored in the memory 97, that is, realizes the data transmission method of FIG. 4 and various optional implementation modes, or realizes Figure 7 and the data transmission method of each optional implementation.

The memory 97 may mainly include a program storage area and a data storage area. The program storage area may store an operating system and an application program required by at least one function; the data storage area may store data created according to the use of the data transmission device. In addition, the memory 97 may include a high-speed random access memory, and may also include a non-volatile memory, such as at least one magnetic disk storage device, a flash memory device, or other non-volatile solid-state storage devices.

The data transmission device shown in FIG. 11 may be an access point or a station in a WLAN. When the data transmission device is an access point or a station, the data transmission method of FIG. 4 and each optional implementation manner is implemented. When the data transmission device is a station, the data transmission method of FIG. 7 and each optional implementation manner is realized.

The embodiments of the present application also provide a storage medium containing computer-executable instructions, and the computer-executable instructions are used to execute the data transmission method provided by any embodiment of the present application when executed by a computer processor.

The above are only exemplary embodiments of the present application, and are not used to limit the protection scope of the present application.

Those skilled in the art should understand that the term user terminal encompasses any suitable type of wireless user equipment, such as a mobile phone, a portable data processing device, a portable web browser, or a vehicle-mounted mobile station.

In general, the various embodiments of the present application can be implemented in hardware or dedicated circuits, software, logic or any combination thereof. For example, some aspects may be implemented in hardware, while other aspects may be implemented in firmware or software that may be executed by a controller, microprocessor, or other computing device, although the present application is not limited thereto.

The embodiments of the present application may be implemented by executing computer program instructions by a data processor of a mobile device, for example, in a processor entity, or by hardware, or by a combination of software and hardware. Computer program instructions can be assembly instructions, Industry Subversive Alliance (ISA) instructions, machine instructions, machine-related instructions, microcode, firmware instructions, status setting data, or written in any combination of one or more programming languages Source code or object code.

The block diagram of any logic flow in the drawings of the present application may represent program steps, or may represent interconnected logic circuits, modules, and functions, or may represent a combination of program steps and logic circuits, modules, and functions. The computer program can be stored on the memory. The memory can be of any type suitable for the local technical environment and can be implemented using any suitable data storage technology, such as but not limited to read-only memory (Read-Only Memory, ROM), random access memory (Random Access Memory, RAM), optical Memory devices and systems (Digital Video Disk (DVD) or Portable Compact Disc (CD)), etc. Computer-readable media may include non-transitory storage media. The data processor can be of any type suitable for the local technical environment, such as but not limited to general-purpose computers, special-purpose computers, microprocessors, digital signal processors (DSP), application specific integrated circuits (ASICs), programmable Logic devices (Field Programmable Gate Array, FPGA) and processors based on multi-core processor architecture.

Claims

A data transmission method, including:

The first communication node successfully competes for the channel on the first channel;

On the second channel, the first communication node performs channel detection within a preset period of time before the transmission time of the first channel, and obtains a detection result;

In the case that the detection result is idle, the first communication node sends a notification frame to the second communication node on the second channel; wherein the notification frame is used to indicate that the second communication node is at all locations. No data is sent on the second channel.
The method according to claim 1, wherein the notification frame includes at least one of the following:

The type of the notification frame;

The identification of the first channel;

The length of time that the first communication node sends on the first channel;

The sending time of the first communication node on the first channel.
The method according to claim 2, wherein the identification of the first channel includes at least one of the following: a channel number, a center frequency point corresponding to the channel, and a link number.
2. The method according to claim 1, wherein the second channel is a channel in the first communication node that cannot simultaneously perform transceiving operations with the first channel.
The method according to claim 1, wherein the second communication node is a communication node associated with the first communication node and not currently working on the first channel.
The method according to claim 1, wherein the first communication node sending a notification frame to the second communication node on the second channel comprises:

The first communication node sends the notification frame to the second communication node on the second channel at a preset time; wherein, the preset time is no later than the sending time of the first channel The moment.
The method according to any one of claims 1-6, wherein, before the first communication node successfully competes for a channel on the first channel, the method further comprises:

The first communication node sends a first multi-channel capability parameter to the second communication node; wherein the first multi-channel capability parameter includes at least a first frequency interval threshold.
7. The method according to claim 7, wherein the first frequency interval threshold is used to indicate the absolute value of the difference between the center frequency points corresponding to the two channels that can simultaneously transmit and receive in the first communication node Minimum

In the first communication node, if the absolute value of the difference between the corresponding center frequency points is less than the first frequency interval threshold, the two channels cannot perform receiving and sending operations at the same time;

In the first communication node, the two channels whose corresponding center frequency difference has an absolute value greater than or equal to the first frequency interval threshold can perform receiving and sending operations at the same time.
The method according to any one of claims 1-6, wherein, before the first communication node successfully competes for a channel on the first channel, the method further comprises:

The first communication node receives a second multi-channel capability parameter sent by the second communication node; wherein the second multi-channel capability parameter includes a second frequency interval threshold.
The method according to claim 9, wherein the second frequency interval threshold is used to indicate the absolute value of the difference between the center frequency points corresponding to the two channels that can simultaneously transmit and receive in the second communication node Minimum

In the second communication node, if the absolute value of the difference between the corresponding center frequency points is less than the second frequency interval threshold, the two channels cannot perform receiving and sending operations at the same time;

In the second communication node, two channels whose corresponding center frequency difference has an absolute value greater than or equal to the second frequency interval threshold can perform receiving and sending operations at the same time.
The method according to any one of claims 1 to 6, wherein the first communication node performs channel detection on the second channel within a preset period of time before the sending time of the first channel, and obtains detection The results include:

The first communication node determines that the signal strength detection result is idle within a preset period of time before the sending time of the first channel on the second channel, and the network allocation corresponding to the second channel When the vector is zero, it is determined that the detection result is idle.
A data transmission method, including:

The second communication node receives the notification frame sent by the first communication node on the second channel; wherein the notification frame is used to instruct the second communication node not to send data on the second channel;

The second communication node determines not to send data on the second channel according to the notification frame.
The method according to claim 12, wherein the notification frame includes at least one of the following:

The type of the notification frame;

The identification of the first channel;

The length of time that the first communication node sends on the first channel;

The sending time of the first communication node on the first channel.
The method according to claim 13, wherein, in the case that the notification frame includes the length of time that the first communication node transmits on the first channel, the second communication node determines that the notification frame is Not sending data on the second channel includes:

According to the notification frame, the second communication node determines not to send data on the second channel within the duration.
The method according to claim 13, wherein the identification of the first channel includes at least one of the following: a channel number, a center frequency point corresponding to the channel, and a link number.
The method according to claim 12, wherein the second channel is a channel in the first communication node that cannot simultaneously perform a transceiving operation with the first channel.
The method according to claim 12, wherein the second communication node is a communication node associated with the first communication node and not currently working on the first channel.
The method according to any one of claims 12-17, wherein, before the second communication node receives the notification frame sent by the first communication node on the second channel, the method further comprises:

The second communication node receives the first multi-channel capability parameter sent by the first communication node; wherein the first multi-channel capability parameter includes at least a first frequency interval threshold.
The method according to claim 18, wherein the first frequency interval threshold is used to indicate the absolute value of the difference between the center frequency points corresponding to the two channels that can simultaneously transmit and receive in the first communication node Minimum

In the first communication node, the absolute value of the difference between the corresponding center frequency points is less than the first frequency interval threshold for the two channels, and the receiving and sending operations cannot be performed at the same time;

In the first communication node, the two channels whose corresponding center frequency difference has an absolute value greater than or equal to the first frequency interval threshold can perform receiving and sending operations at the same time.
The method according to any one of claims 12-17, wherein, before the second communication node receives the notification frame sent by the first communication node on the second channel, the method further comprises:

The second communication node sends a second multi-channel capability parameter to the first communication node; wherein the second multi-channel capability parameter includes at least a second frequency interval threshold.
The method according to claim 20, wherein the second frequency interval threshold is used to indicate the absolute value of the difference between the center frequency points corresponding to the two channels that can simultaneously transmit and receive in the second communication node Minimum

In the second communication node, if the absolute value of the difference between the corresponding center frequency points is less than the second frequency interval threshold, the two channels cannot perform receiving and sending operations at the same time;

In the second communication node, two channels whose corresponding center frequency difference has an absolute value greater than or equal to the second frequency interval threshold can perform receiving and sending operations at the same time.
A data transmission device includes: a processor;

The processor is configured to implement the data transmission method according to any one of claims 1-11 when the computer program is executed; or,

The processor is configured to implement the data transmission method according to any one of claims 12-21 when the computer program is executed.
A computer-readable storage medium that stores a computer program, wherein the computer program implements the data transmission method according to any one of claims 1-11 or implements the data transmission method according to any one of claims 1-11 when the computer program is executed by a processor. Any of the data transmission methods.